Ceram. int. Ceram. int. Solvothermal synthesis and characterization of ytterbium/iron mixed oxide nanoparticles with potential functionalities for applications as multiplatform contrast agent in medical image techniques Yeste M. P. Fernández-Ponce C. Félix E. Tinoco M. Fernández-Cisnal R. García-Villar C. Pfaff C. Kriwet J. Natividad E. Universidad de Zaragoza Cauqui M. A. Garcia-Cozar F. Litrán R. Bomati-Miguel O. 2022 research-article